We have had our Lowrance for 3 month now. We where given an external antenna for our GPS and we feel like this a great system. We have found that if the system does not have the address we can make a point very close to what we are looking for. The Lowrance has been very correct in telling us what lane we need to be in for our next exit or what side of the road our customer is on. The Lowrance has several sub menu's one being a RV menu which will tell us where the next Pilot or Flying J is. It is also very handy while driving to look up the next rest area. When updates are available you down load them off of internet. The screen size is also easy to read while driving and has different levels of lighting. We feel like the system is very user friendly. We have found it well worth the money (600.00 to 700.00) and was ranked very high on independent comparison charts.